Milling machine



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J. J. LA DUCER MILLING MACHINE Filed Nov. 28,v 1921 2 Sheets-Sheet lnee.. 9, 1924. I 1,518,154

J. J. LA DUCR MILLING MACHINE Filed Nov. 28, 15921 2 Sheets-Sheet 2 AHartford, in the county of Patented Dec. 9, 1924.

UNITED -s'rA'ri-:s

1,518,154 PATENT GFFl-CE.

JERRY J. LA DUCER, F HARTFORD, CONNECTICUT, ASSIGNOR T0 PRATT & WHITNEYCOMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW JERSEY.

MILLING MACHINE.

Application med November 28, 1921. Serial No. 518,330.

To all whom z't may concern.'

Be itknewn that I, JERRY J. LA Ducnn, a citizen of the United Statesresiding at Iartford and State of Connecticut, have invented certain newand, useful Improvements in Milling Machines, of which the following isa speci- .fication This invention relates` to metal working machines andparticularly to milling inachines of the column and knee type. The

primary object of the invention is to provide an improved millingmachine of'this type combining an improved column construction providinga reservoir, mechanism in combination therewith particularly adapted tosupply a coolant to the tool, and improved means for returning suchcoolant from the table to the reservoir within the column.

Another object of the invention is to provide an im roved columnconstruction comprising a ollow column provided with a verticalreinforcing and dividing web therein, such web dividing the column intoan inner reservoir portion and an open outer portion adapted to receivea spindle driving means therein.

'Another object of the invention is toprovide an improved work supportconstruction comprising a vertically adjustable knee, a saddlehorizontally adjustable thereon and a work table movably mounted on thesaddle, such three elements each bein provided with a coolant' receivingtroug and improved means cooperating with the troughs for directing thecoolant from the table to the reservoir in the base of the column.

With these and other objects in view, my invention consists in thefeatures of construction and operation set forth in the followingspecification and illustrated in the accompanying drawings. In suchdrawin s annexed hereto and forming a part of this specification, I haveshown certain embodiments of my invention in a milling machine, but itwill be understood that the invention can be otherwise embodied and thatthe drawings are not to be construed as defining or limiting-the scopeof the invention, the claims appended to this specification being reliedupon for that purpose.

Referring to the figures of the drawings: Figure l is a side elevationof a milling machine, partially in section, illustrating certainfeatures of my invention.

Fig. 6 is a detail view taken on line 6-6 of Fig. 5.

Referring more specifically to the drawings by reference characters, 1indicates the base, 2 the column, and 3 the spindle supporting over-armof a millin machine illustrative of my invention. ork supporting means,comprising a knee 4 provided with a saddle 5 and a table 6 thereon, isvertically adjustable on the column by means of a screw 7. A hand wheel8 is provided for operating the screw 7 and the saddle may be adjustedhorizontally on the knee b means of a hand wheel 9 on a screw 9a. hetable is provided with a rack 10 'adapted to be engaged by a pinionthrough which the table may be operated either by hand or power in theusual and well known manner. A power table feeding shaft l1 is providedin the knee and is adapted to be driven through a-telesco ic shaftconnection 12 from the spindle riving mechanism now to be described.

A tool spindle 18 is rotatably mounted in the column and hasconcentrically mounted thereover a driving sleeve 14: supported inbearings independently of the spindle. The sleeve is adapted to drivethe spindle through a gear 15 on the sleevemeshing with a gear 16 on aparallel shaft 17 having a second gear 18 thereon meshing with a gear 19on the spindle.' The telescopic connection 12 to the tool feedingmechanism is driven from the shaft 17 through gears 20 and 21, shaft 22and change gears 23 to a stub shaft 24 operatively connected to thetelescopic shaft. The spindle driving gears 18 and 19 and the changegears 23 are interchangeable in a manner to vary either the spindlespeed or the table feeding speed independently of the other. The spindledriving sleeve 14 is illustrated as being driven from a motor 25 mountedon the base of the column, a belt 26 operatively connecting a pulley 27on the sleeve with a pulley 28 on the motor shaft. This mechanism is allmore specifically shown and described in my copending application SerialNo. 518,329 filed on even date herewith.

As will be noted, the column 2 is hollow and is provided with avertically extending web 29 therein, such web dividing the column intoan inner reservoir portion 30 and a rear open outer portion 31. Thereservoir portion is preferably extended outwardly at the front ofthemachine at 32 to a position beneath the knee, the purpose of which willbe hereinafterv described. The rear outer portion 31, as illustrated inFig. 1, provides a space within the outlines of the column for housingthe belt 26, or other spindle driving means. It should furthermore benoted that the web 29 operates as a reinforcement tFig. 4) to the columnand provides a bearing support for the shaft 22.

The table 6 of the work-support is provided with a surrounding trough 33preferably integral therewith. The saddle 5 is provided with a trough34, extending along the front edge thereofI and the knee 4 is likewiseprovided with a similar trough 35 extending along one side thereof. Thetable trough 33 is provided with an opening 36 therein which opening inall positions of the table is over some portion of the trough 34 in thesaddle. A screen 36a is mounted in the opening 36 to prevent chips frompassing through the opening The saddle trough 34 is provided with anopening 37 therein which opening in all positions of the saddle is oversome portion of the knee trough 35. The knee 4 is provided in its rearlportion with a cored opening 38 in communication with the trough 35therein and extending downwardly within the knee to a position directlyover the before-mentioned forwardly extended portion 32 of the reservoir30. Means, preferably comprising telescopic pipes or casings 39 and 40provides a communication between the cored opening 38 and the reservoir.As illustrated in Fig. l, the pipe 39 is screwed into the knee at thelower end of the opening 38. Such pipe is telescoped within the casing40 which extends freely into the reservoir. These two elements aresecured together by a cap 4()a surrounding the pipe and threadedlyengaging the casing over a bushing 39a threaded to the lower end of thepipe. The casing 40 is cut away at 40b to permit free flow of liquidtherefrom when the casing rests on the bottom of the reservoir asillustrated in Fig. l. The arrangement of the mechanism is such that acoolant iiowing onto the work table will in all positions of the worksupporting mechanism be conducted through the several troughs andopenings to the reservoir. With the knee in its lowered position, thepipe 39 'telescopes Within lthe casing 40 and the freedom of the casin40 within the reservoir opening permits t ecasing to be lifted upwardlyby the pipe 39` when the knee is elevated to a position higher than thatshown in Fig. 1.

A pump 41 is provided for supplying the tool with a coolant liquid fromthe reservoir 30. I preferably mount this pump on a bracket 42 at thetop of the column, bolts '43 securing the pump to the bracket and bolts44 securing bracket to the column. The pump is driven from a. sprocket45 on the shaft 17 through a flexible chain belt 46. Screws 47 areprovided in the bracket in connection with the bolts 44 for verticallyadjusting the bracket and pump to place the proper driving tension onthe chain 46.

An intake pipe 48l extends from the reservoir upwardly into one side ofthe pum a priming pipe 49 branching therefrom ad)- jacent the pump andextending upwardly through the over-arm 3; An outlet or discharge pipe50 extends outwardly and downwardly from the other side of the pump.This pipe branches to rovide a discharging pipe 51 to the tool an anover-flow pipe 52 provided with a relief valve 53 thereon at its lowerend. By removing the over-arm 3, the pump and pipe connections 48, 49,50, 52 and 53 may be assembled in or removed from the column as a unit.In operation, the pump may first be primed by pouring a coolant liquidinto the priming pipe 49. The coolant is drawn upwardly into the pumpfrom the reservoir through the pipe 48 and is normally discharged fromthe pum through the pipes 50 and 51 to the tool. hould the pipe 51become closed or the pressure therein exceed a certain limit, the valve53 will be opened and the liquid permitted to flow through the branchpipe 52 back into the reservoir.

The invention illustrated and described herein provides a millingmachine combining various improvements, particularly in the toollubricating and cooling system thereof. The column is rigidlyconstructed and so arranged as to provide both a reservoir mostconveniently located therein and a space adjacent` thereto for housingthe spindle driving means, as the belt 26 illus- Y trates. A pump andmechanism cooperating therewith, including driving means therefor, areconveniently arranged within the column for supplying the proper amountof coolant from the reservoir to the tool over the table. The worksupportin mechanism comprising the knee, saddle and table is so arrangedthat such coolant flowing onto the work table will, in all positions ofthe work supporting mechanism, be conducted through the several troughsand openings to the-reservoir. It shouldbe understood that theaccompanying drawings are illustrative only of these and otheradvantages and im-` provements comprising the invention and thatmodifications thereof within the scope `the saddle trough havingal1-opening therefrom positioned over the first trough in all positionsof saddle adjustment, a work table lineally movable on the saddle andprovided with a trough therein, the table trough having an openingtherefrom positioned over the saddle trough in all positions of tab-lemovement, and a reservoir into which the first named trough empties, thearrangement being such that al coolant flowing on the work table will inall positions of the work supporting mechanism be conducted through theseveral troughs and openings to the reservoir. v

2. In a milling machine, the combination of a column, a knee verticallyadjustable thereon and provided with a trough therein, a saddleadjustable on the knee and provided with a trough therein, the saddletrough having an opening therefrom positioned over the first trough inall positions of saddle adjustment, a work table lineally movable on thesaddle and provided with a trough therein, the table trough having anopening therefrom positioned over the saddle trough in all positions oftable movement, and a reservoir into which the first named troughempties, the arrangement being such that a coolant flowing on the worktable will in all positions of the work supporting mechanism beconducted through the several troughs and openings to the reservoir.

3. In a milling machine, the combination of a column, a knee verticallyadjustable thereon and provided with a trough therein, a saddleadjustable on the knee and provided With a trough therein, the saddletrough having an opening therefrom positioned over the first trough inall positions of saddle adjustment, a work table lineally.

movable on the saddle and provided with a trough therein, the tabletrough having an opening therefrom positioned over the saddle trough inall positions of table movement, a reservoir formed in the base of thecolumn, and means providing a duct between the knee trough andreservoir, the arrangement being such that a coolant flowing on the Worktable will in all positions of the work supporting mechanism beconducted through the several troughs and openings to the reservoir.

4. In a milling machine, the combination of a column, a knee verticallyadjustable thereon and rovided with a trough therein,

a saddle adjustable on the knee and provided with a trough therein, thesaddleI -trough having an opening therefrom positioned over the firsttrough in all positions of saddle adjustment, a work table lineallymovable on the saddle an'd provided with a trough therein, the tabletrough having an opening therefrom positioned over the saddle trough inall positions of table movement, a reservoir, and telescopic meansbetween the knee and reservoir providing a duct therebetween in allpositions of ad- 'ustment of the knee, the arrangement being such that acoolant iiowingon the work I table will in all positions of the worksupporting mechanism be conducted through the several troughs andopenings to the reservoir. i

5. In a milling machine, the combination of a column, a knee verticallyadjustable thereon and provided with a trough and a cored openingtherein extending downwardly from Ithe trough, a saddle adjustable onthe knee and provided with a trough therein, the saddle trough having anopening therefrom positioned over the first trough in all positions ofsaddle adjustmentfa work table lineally movable on the saddle andprovided with a trough therein, the table having an opening therefrompositioned over the saddle trough in all positions of table movement, areservoir, and telescopic means between the lower end oi the coredopening and the reservoir and providing a duct therebetween in allpositions of adjustment of the knee, the. arrangement being such that acoolant flowing on the work table will in all positions of the work suporting mechanism be conducted through t e several troughs and openingsto the reservoir.

6. In a milling machine, the combination of a column, a knee verticallyadjustable thereon and provided with a trough and a cored openingtherein extending downwardly from the trough, a saddle adjustable on theknee and provided with a trough therein, the saddle trough having anopening therefrom positioned over the first trough in all positions ofsaddle adjustment, a work table lineally movable on the saddle andprovided with a trough therein, the table trough having an openingtherefrom positioned over the saddle trough in all positions of tablemovement, a reservoir. and means secured to the knee at the lower end ofthe opening and extending downwardly into the reservoir to provide aduct therebetween in all positions of'adjustment of the knee, thearrangement being such that a coolant flowing on the work table will inall positions of. the work supporting mechanism be conducted through theseveral troughs and o enings to the reservoir.

7 In a milling machine` the combination of a colum, a knee verticallyadjustable thereon, a reservoir in the column, and telescopie meanssecured to the knee and extending loosely into the reservoir, the saidmeans providing a' duct for conducting a coolant from the knee tothereservoir.

8. In a milling machine, the combination of a column, a knee verticallyadjustable thereon, a reservoir in the column extending outwardly to aposition beneath the knee,.and means secured to the knee and extendingdownwardly into the extended portion of the reservoir beneath the knee,the said means providing a duct for conducting a coolant from the kneeto the reservoir.

9. In a milling machine, the combination of a base, a work supportthereon, a saddle slidable on the work support, the work support beingprovided with a trough therein 1 adapted to receive a coolant from thesaddle, a reservoir in the base, and means in# cluding a cored openingextending downv wardly from the trough and through the work support forconducting a coolant to the reservoir.

10. In a milling machine, the combination of a column, a reservoir` aknee vertically adjustable on the column, and a work support mounted onthe knee, the knee being provided with a cored opening extendingdownwardly therethrough and providing in part a duct for directing acoolant from the work support to the reservoir.

11. In a milling machine., the combination of a column, a reservoir inthe base thereof, a knee vertically adjustable thereon and provided witha coolant receiving trough therein and a cored opening extendingdownward therein from the trough, and means providing a duct between theopening and reservoir.

12. In a milling machine, the combination of a column, a knee verticallyadjustable thereon, a reservoir in the base of the column, the kneebeing provided with a cored opening extending downward therethrough,

l and telescopic means secured to the knee at the lower end of theopening and extending into the reservoir, the said 4opening and meansproviding a duct for conducting a coolant from the knee to thereservoir.

13. In a milling machine, the combination of a hollow column, a toolspindle rotatable therein, a work support vertically adjustable thereonbeneath the spindle, and an integral web extending vertically thereinand dividing the column into an inner reservoir portion and an openouter portion, the said outer portion providing a space for a spin dledriving means extending from the base of the column to the spindle.

14. In a. milling machine, the combination A of a hollow column, a toolspindle rotatable therein, a work support vertically adjustable thereonbeneath the spindle, an integral web extending vertically therein anddividing the column into an inner reservoir portion and an open outerportion, a motor mounted on the base of the column and having a beltpulley extending into the said outer portion, and a belt from the saidpulley extending upwardly in the said outer portion and operativelyconnected to the spindle to drive the same.

15. In a millng machine, the combination of a hollow column, a toolspindle rotatable therein, a work su port vertically adjustable thereonbeneath t e spindle, a web extending vertically therein and dividing thecolumn into an inner reservoir ortion and an open outer portion, the saireservoir extending outwardly of the column to a position beneath thework support, the base of the column at the rear thereof being adaptedto have a motor mounted thereon, and thesaid outer portion providin a s)ace for a belt adapted to extend upwar ly rom a pulley on the motorshaft to a pulley connected to the s indle.

16. In a mil ing machine, the combination ot' a column, a work support,a hollow overarm mounted on the column, a pump mounted on the colmnnwithin the arm, a reservoir, piping leading from the pump to thereservoir and work support, and means t'or driving the pump.

17. In a milling machine, the combination ot a column, a work support, ahollow over.- arm mounted on the column, a pump mounted on a bracket onthe column within the arm, a priming pipe leading from the pum throughthe arm, a reservoir, piping lea ing from the pump to the reservoir andwork support, and means for driving the pump.

18. In a milling machine, the combination of a column, a work support, ahollow overarm mounted on the column, a pump mounted on a bracket on thecolumn within the arm, a reservoir, piping leading from the pump to thereservoir and work support, belt means for driving the pump, and meansfor adjusting the bracket to tension the belt.

19. In a millin machine, the combination of a column, a nee verticallyadjustable thereon, a work table movably mounted on the knee, a hollowover-arm mounted on the column, a pump mounted on the column within thearm,l a reservoir in the base of the column, piping leading from thepump to the reservoir and work support, means for directing a coolantfrom the table to the reservoir, and means for driving the pump.

20. In a milling machine, the comb'nation of a column, a pump mountedthereon, a reservoir within the base of the column, an intake pipeleading from the pum i into the reservolr, and a discharge pipe lea ingfrom the pump downwardly toward the reservoir, the pump and the saidpipes being removable from the column as a unit.

21. In a milling machine, the combination of a column, a work support, ahollow overarm mounted on the column, a pump mounted on the columnwithin the arm, a'reservoir within the base of the column, an intakepipe leading from the pump into the reservoir, a discharge pipe leadingfrom the pump downwardly toward the reservoir,

and at` pipe branching from the discharge pipe and extending over thework support, 10 the pump and the first two named pipes being removablefromr the column as a unit.

In testimony whereof, I hereto aix my signature.

JERRY J. LA DUCER.

